CNN-Weather/Environment

By Jennifer Gray, CNN Meteorologist An atmospheric river is a plume of moisture that helps carry saturated air from the tropics to higher latitudes, delivering unrelenting rain or snow. Think of it as a fire hose that aims at — then drenches — a particular region. Typically 250 to 375 miles wide, atmospheric rivers can

By Aya Elamroussi, CNN Officials in California are imploring residents to prepare for a powerful storm set to lash the region with torrential rain later this week as the state continues to recover from colossal amounts of snow that trapped mountain communities. Previous severe weather was responsible for the death of one person in the

By Jennifer Gray, CNN Meteorologist For the last several weeks, high temperatures have been breaking records. Many of you may have kissed winter goodbye and already moved on to spring. But don’t get too used to the warmer weather. We could see a huge shift in temperatures next week, and this one won’t be subtle.

By Elizabeth Wolfe, Rob Shackelford, Camila Bernal and Sarah Moon, CNN After back-to-back winter storms overwhelmed many of California’s mountain communities with snow, another round of snowfall is headed to the Sierra Nevada region, while the state’s hard-hit southern San Bernardino County will get a reprieve as some residents who remain trapped by walls of

By Elizabeth Wolfe, Rob Shackelford and Alaa Elassar, CNN At least 13 people have died in multiple states due to severe weather across the country as a powerful storm system that brought golf ball-sized hail and tornadoes to the South continues to march Saturday across the Northeast. The storm spurred wind gusts strong enough to

By Joe Sutton, Holly Yan, Monica Garrett and Alaa Elassar, CNN A wide range of extreme weather is stretching across the US as storms threaten heavy snow in the Southwest and a severe weather system is bringing the triple threat of tornadoes, damaging winds and rain to the South. About 35 million people across parts

By Madison Richardson and Monica Garrett An outbreak of intense severe weather packing damaging winds and strong tornadoes looms over the Southern Plains and South on Thursday and into Friday. The storm system that brought several feet of snow to parts of California will move eastward Wednesday eventually triggering the severe outbreak expected on Thursday.

By Aya Elamroussi, CNN More snow and rain are expected in California as many across the state work to recover from back-to-back bouts of winter weather that knocked out power to thousands and brought many roads to a standstill. Another 12 to 24 inches of snow could fall over the mountains of Southern California on

By Robert Shackelford and Aya Elamroussi, CNN A string of back-to-back winter storms have lashed the West this week, delivering blizzard conditions and heavy snowfall to many areas in California. The dayslong brutal conditions left many stranded, shut down highways, knocked out power to thousands of homes and buried roads in snow as communities ran

By Nouran Salahieh and Joe Sutton, CNN Communities on the West Coast and in the Northeast are dealing with heavy snowfall, strong winds, power outages and dangerous road conditions from a series of storms lashing opposite sides of the US. About 23 million people are under winter weather alerts across the country Tuesday. Some alerts

By Emma Tucker, CNN A derecho is a significant, potentially destructive weather event that is characterized as having widespread, long-lived, straight-line winds associated with a fast-moving group of severe thunderstorms. Here’s what you need to know about derechos: They can produce hurricane-force winds A derecho is classified by a swath of wind damage extending more

By Haley Brink and Eric Levenson, CNN A winter storm dumped massive amounts of precipitation across southern California this weekend, including more than 6.5 feet of snow to Mountain High and more than 5 inches of rain to Cucamonga Canyon. The hefty snowfall totals included 5 feet to Snow Valley, 57 inches to Bear Mountain